Ooo, I'd get a fungal culture on that area asap - it could be ringworm or even mange. Rworm in dogs will not nec. show up as a ring, but it can more be like an area of hair loss. Marcel caught it from his vet and I'm treating him for it now - it started on the top of his head.
Hairloss from food is usually only if there is a malabsorption problem - and that's rare and you'd also see some other pretty severe symptoms.
What is the skin like at the area of loss? Does she chew/lick her leg?
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~
°¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |